Actually, I was a little harsh. If you're specific to one property, hotelscombined.com might not make a difference. The site is similar to trivago in that it comparison-shops a lot of sites. At any rate, much more effective than expedia or orbitz cause ocassionally you will get a 'mistake' rate through hotelscombined that is less than all others.

PS: I love the free-cancelation feature offered by some of the links. That way, you can take delight in pressing the button, not once but maybe twice.